t: prepare execution of potentially failing commands for set -e

Several of our tests verify whether a certain binary can be executed,
potentially skipping tests in case we cannot, for example because the
binary doesn't exist. In those cases we often run the binary outside of
any conditionally.

This will start to fail once we enable `set -e`, as that will cause us
to bail out the test immediately. Improve these tests by executing them
inside of a conditional instead.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: pks-t

t/lib-git-svn.sh

@@ -15,8 +15,7 @@ GIT_SVN_DIR=$GIT_DIR/svn/refs/remotes/git-svn
 SVN_TREE=$GIT_SVN_DIR/svn-tree
 test_set_port SVNSERVE_PORT
 
-svn >/dev/null 2>&1
-if test $? -ne 1
+if ! svn help >/dev/null 2>&1
 then
 	skip_all='skipping git svn tests, svn not found'
 	test_done
@@ -27,13 +26,13 @@ export svnrepo
 svnconf=$PWD/svnconf
 export svnconf
 
+x=0
 perl -w -e "
 use SVN::Core;
 use SVN::Repos;
 \$SVN::Core::VERSION gt '1.1.0' or exit(42);
 system(qw/svnadmin create --fs-type fsfs/, \$ENV{svnrepo}) == 0 or exit(41);
-" >&3 2>&4
-x=$?
+" >&3 2>&4 || x=$?
 if test $x -ne 0
 then
 	if test $x -eq 42; then

t/lib-httpd.sh

@@ -235,11 +235,10 @@ start_httpd() {
 
 	test_atexit stop_httpd
 
-	"$LIB_HTTPD_PATH" -d "$HTTPD_ROOT_PATH" \
+	if ! "$LIB_HTTPD_PATH" -d "$HTTPD_ROOT_PATH" \
 		-f "$TEST_PATH/apache.conf" $HTTPD_PARA \
 		-c "Listen 127.0.0.1:$LIB_HTTPD_PORT" -k start \
 		>&3 2>&4
-	if test $? -ne 0
 	then
 		cat "$HTTPD_ROOT_PATH"/error.log >&4 2>/dev/null
 		test_skip_or_die GIT_TEST_HTTPD "web server setup failed"

t/t3901-i18n-patch.sh

@@ -28,7 +28,8 @@ check_encoding () {
 		8859)
 			grep "^encoding ISO8859-1" ;;
 		*)
-			grep "^encoding ISO8859-1"; test "$?" != 0 ;;
+			ret=0; grep "^encoding ISO8859-1" || ret=$?
+			test "$ret" != 0 ;;
 		esac || return 1
 		j=$i
 		i=$(($i+1))

t/t5000-tar-tree.sh

@@ -503,8 +503,8 @@ test_expect_success LONG_IS_64BIT 'set up repository with huge blob' '
 # would generate the whole 64GB).
 test_expect_success LONG_IS_64BIT 'generate tar with huge size' '
 	{
-		git archive HEAD
-		echo $? >exit-code
+		{ ret=0 && git archive HEAD || ret=$?; } &&
+		echo "$ret" >exit-code
 	} | test_copy_bytes 4096 >huge.tar &&
 	echo 141 >expect &&
 	test_cmp expect exit-code

t/t7422-submodule-output.sh

@@ -198,7 +198,7 @@ test_expect_success !MINGW 'git submodule status --recursive propagates SIGPIPE'
 	(
 		cd repo &&
 		GIT_ALLOW_PROTOCOL=file git submodule add "$(pwd)"/../submodule &&
-		{ git submodule status --recursive 2>err; echo $?>status; } |
+		{ { ret=0 && git submodule status --recursive 2>err || ret=$?; } && echo $ret >status; } |
 			grep -q recursive-submodule-path-1 &&
 		test_must_be_empty err &&
 		test_match_signal 13 "$(cat status)"

t/t9200-git-cvsexportcommit.sh

@@ -11,8 +11,7 @@ if ! test_have_prereq PERL; then
 	test_done
 fi
 
-cvs >/dev/null 2>&1
-if test $? -ne 1
+if ! cvs version >/dev/null 2>&1
 then
     skip_all='skipping git cvsexportcommit tests, cvs not found'
     test_done

t/t9400-git-cvsserver-server.sh

@@ -17,12 +17,13 @@ if ! test_have_prereq PERL; then
 	skip_all='skipping git cvsserver tests, perl not available'
 	test_done
 fi
-cvs >/dev/null 2>&1
-if test $? -ne 1
+
+if ! cvs version >/dev/null 2>&1
 then
     skip_all='skipping git-cvsserver tests, cvs not found'
     test_done
 fi
+
 perl -e 'use DBI; use DBD::SQLite' >/dev/null 2>&1 || {
     skip_all='skipping git-cvsserver tests, Perl SQLite interface unavailable'
     test_done

t/t9401-git-cvsserver-crlf.sh

@@ -60,12 +60,12 @@ check_status_options() {
     return $stat
 }
 
-cvs >/dev/null 2>&1
-if test $? -ne 1
+if ! cvs version >/dev/null 2>&1
 then
     skip_all='skipping git-cvsserver tests, cvs not found'
     test_done
 fi
+
 if ! test_have_prereq PERL
 then
     skip_all='skipping git-cvsserver tests, perl not available'

t/t9402-git-cvsserver-refs.sh

@@ -68,12 +68,12 @@ check_diff() {
 
 #########
 
-cvs >/dev/null 2>&1
-if test $? -ne 1
+if ! cvs version >/dev/null 2>&1
 then
 	skip_all='skipping git-cvsserver tests, cvs not found'
 	test_done
 fi
+
 if ! test_have_prereq PERL
 then
 	skip_all='skipping git-cvsserver tests, perl not available'

t/test-lib-functions.sh

@@ -1248,8 +1248,7 @@ test_might_fail () {
 test_expect_code () {
 	want_code=$1
 	shift
-	"$@" 2>&7
-	exit_code=$?
+	exit_code=0; "$@" 2>&7 || exit_code=$?
 	if test $exit_code = $want_code
 	then
 		return 0